4. Compile the project and copy the resulting DLL assembly to your website bin folder where there also should be avt.NavXp.dll and avt.NavXp.Core.dll assemblies.

5. We now have to let NavXp there's a new plugin it should load. Open file/DesktopModules/NavXp/Plugins/.ExternalPlugins.xml in a text editor and add a new PluginClass node that references your class using Namespace.Class,AssemblyName convention.